Volcanic cones. June 25, 2001 Web posted at: 6:17 PM EDT (2217 GMT) Lesson Plans by month Lesson Plans by subject. ... Measure the average slope angle with a protractor. 5.

On Saturday, March 29, a large avalanche swept the southeast section of New Hampshire's Mount Washington's summit cone. According to U.S.F.S. Snow Ranger Chris Joosen, "A slide of this magnitude has ...